r8lt, a FORTRAN90 code which carries out some basic linear algebra operations on R8LT matrices (real 64 bit precision lower triangular format).
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
r8lt is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version
R83, a FORTRAN90 code which contains linear algebra routines for R83 matrices (real, 64 bit, tridiagonal 3xN format).
R8COL, a FORTRAN90 code which contains utility routines for R8COL's, that is, double precision real MxN arrays, considered as N column vectors, each of length M. The data may be thought of as a matrix of multiple columns, and many operations will be carried out columnwise.
R8GE, a FORTRAN90 code which contains linear algebra routines for R8GE matrices (real, 64 bit, General format).
R8ROW, a FORTRAN90 code which contains utility routines for R8ROW's, that is, double precision real MxN arrays, considered as M row vectors, each of length N. The data may be thought of as a matrix of multiple rows, and many operations will be carried out rowwise.
R8UT, a FORTRAN90 code which contains linear algebra routines for R8UT matrices (real, 64 bit, upper triangular format).